Driving mechanism for the detaching device of a comber



Jan. 20, 1970 M-w E 3,490,298

DRIVING MECHANISM FOR THE DETACH-ING DEVICE OF A COMBER Filed Sept. 6, 1967 3 Sheets-Sheet l INVENTOR MANFRED WELKER BY wzg 97 41:

ATTORNEYS M. WELKER Jan. 20, 1970' DRIVING MECHANISM FOR THE DETACHING DEVICE OF A COMBER 3 Sheets-Sheet I Filed Sept. 6, 1967 INVENTOR MANFRED WELKER Jan. 20, 1970 M. WELKER 3,490,298

DRIVING MECHANISM FOR THE DETACHING DEVICE OF A COMBER Filed Sept. 6, 1967 3 Sheets-Sheet 5 INVENTOR. MANFRED WELKER United States Patent US. Cl. 74-42 2 Claims ABSTRACT OF THE DISCLOSURE A driving mechanism for the detaching and nipping device fo a comber is disclosed which comprises a crank lever rotatably supported in the comber, an elbow lever having one end thereof pivotally supported in the comber and the other end thereof pivotally connected to the detaching and nipping device, and a connecting rod interconnecting the crank and elbow levers and asymmetrically connected to the crank lever so that the inner dead center position of the crank lever and the connecting rod is angularly oifset with regard to the outer dead center position thereof, whereby the angle of rotation of the crank lever for the movement of the detaching and nipping device from the detaching position to its so-called delivering position is smaller than the angle of rotation corresponding to the movement of the detaching device from the delivering position to the detaching position. Thus, the first-mentioned movement is accelerated with respect to the last mentioned movement.

Background of the invention The present invention relates to a driving mechanism for the reciprocable detaching device or the reciprocable nipping device of a comber with intermittent action or socalled rectilinear comber, said comber being equipped with an intermittent crank drive.

Driving mechanisms of this general type are known and are generally designed as connecting rod cam gear drive with intermittent action in order to obtain a standstill of the reciprocable detaching device or nipping device in the detaching position of the device.

One of the drawbacks of this last-mentioned drive is the fact that the periods for the movements of the detaching device and nipping device are identical in both directions and that the detaching position itself is merely determined by the crank lever of the drive. This fact very unfavorably afiects the accuracy of the detaching position of the detaching device so that the running of the machine may become uneven.

It is, therefore, an object of the present invention to provide a driving mechanism for a comber with intermittent action which will overcome the drawbacks of the heretofore customary driving mechanisms.

It is another object of the present invention to provide a driving mechanism for a comber of the type described which will assure improved conditions of the detaching or nipping device during the movement and during the standstill thereof in the detaching position.

Still more specifically, it is the object of the present invention to accelerate the movement of the detaching or nipping device from the detaching position to the socalled delivering position with regard to the reverse movement of the detaching or nipping device from the delivering to the detaching position. Moreover, the inertia forces of the devices are to be absorbed by the frame of the comber.

Summary of the invention With these and other objects in mind, the present invention is characterized in that the comber has been 3,490,298 Patented Jan. 20, 1970 provided with an elbow lever the inner or outer dead center position of which determines the detaching position of the detaching or nipping device, while a connecting rod interconnecting the crank lever and the elbow lever is asymmetrically connected to the crank lever and while crank lever and elbow lever are either in the inner or outer dead center position in the detaching position of the device.

More specifically, with a comber having a detaching device which is reciprocable from a detaching position to a delivering position and vice versa, the driving mechanism comprises a crank lever which is rotatably supported in the comber, an elbow lever connected at one end to the detaching device and at the other end pivotally to the comber, and a connecting rod interconnecting the crank lever and the elbow lever and being asymmetrically connected to the crank lever so that the inner and outer dead center positions of the crank lever and connecting rod are angularly offset with regard to each other.

The asymmetrical pivotal connection of the connecting rod between the two levers at the crank lever, in a very simple manner, brings about the desired acceleration of the movement of the detaching device or nipping device from the detaching position to the delivering position with regard to the movement in direction. In this way, the pull of the comber becomes more even, nits and other impurities are greatly reduced while the comber waste rate is likewise considerably reduced. The inertia forces of the detaching device or nipping device in the detaching position is effected in the inner or outer dead center position of the elbow lever.

Brief description of the drawing Description of a preferred embodiment In FIG. 1 there are shown stationary bearings 3, 18, 19, 21, 23, 25, 30, 37 and 45, fixedly attached to the frame of the combing machine and flexibly supporting crank lever 1, elbow lever 4, 5, double lever 6, nipping device 20, toothed wheel 24, toothed wheel 27, rocking arm 31, lever 38 and tension spring 44 respectively. Crank lever 1 which is rotatable at constant speed in clockwise direction is pivotably connected at 14 to one end of a connecting rod 2. At its opposite end rod 2 is pivotably connected at 15 to the lever arm 4 of the elbow lever 4, 5. The pivotable support of the latter is at 16. At 17, the lever arm 5 of the elbow lever 4, 5 is pivotably connected to one end of a double level 6. At its opposite end lever 6 is pivotably linked at 28 to one end of a coupling rod 29, whose opposite end is pivotably linked at 32 to a rocker arm 31. A detaching device 7, comprising the detaching rollers 7' and 7" is mounted on the rocker arm 31 at its end distal from the bearing 30.

A cam disk 33 and a counter cam disk 34 are rotatably supported in bearings 3. Rotation of the disks 33 and 34 is transmitted via rollers 35, 3'6 with which the disks are in tangential contact, to lever 38 and causes the latter to oscillate about its point of support 37. Lever 38 has a plurality of arms, of which a first arm is connected to roller 36 and a second arm, oriented at an angle of approximately with respect to the first arm, is connected to roller 35. A third arm of lever 38 is pivotably connected at 39 to one end of a coupling element 40 whose opposite end is formed as a fork 41. A bolt 42, fixedly mounted on lever 43 and extending perpendicularly thereto is engageable in the recess formed by the fork 41. Lever 43 is held in substantially horizontal position by a tension spring 44 which connects a point on the longitudinal axis of lever 43 and the bearing 45. A fourth arm of lever 38 is pivotably connected at 46 to one end of a coupling element 47 which, at its opposite end is pivotably linked, are jointly supported in bearings 21, form a nipping device 20, including an upper member 20" and a lower member 20' which, together, form a structure resembling tongs.

A gear system comprising toothed wheels 22, 24 and 27 is driven by drive means (not shown) originating in the region of the bearings 3. A combining wheel 26 which is coaxially and fixedly mounted on wheel 27 is rotatable therewith about a common axis at 25.

In a preferred embodiment all rotatabie elements of the mechanism supported in bearings 3, that is, the toothed wheel 22, the crank lever 1, the cam disk 33 and the counter cam disk 34, revolve at the same speed relative to one another.

By means of the linkages shown the drive means originating at bearings 3 are transmitted throughout the mechanism and cause the detaching device 7 and the nipping device 20 to execute reciprocating oscillatory motions toward and away from each other. In the view shown in FIG. 1 the detaching rollers 7' 7" are approaching the nipping device 20. The detaching device 7 is in a detaching position, wherein the nipping members 20', 20" are moved away from each other by a predetermined distance, and the nipping device 20 is moved away from the combing wheel 26 by a predetermined distance.

In a preferred embodiment shown in FIG. 2, connecting rod 2 connecting elbow lever 4, with crank lever 1 is asymmetrically pivotally connected to crank lever 1. To this end, the location of the point of rotation of crank lever 1 at 3 is such with regard to the elbow lever 4, 5 that the outer dead center position of the crank and elbow levers indicated with the reference numeral 8 is angularly offset with regard to the inner dead center position thereof indicated at 9. In other words, the angle of rotation 10 of crank lever 1 corresponding to the return of the detaching device 7 from the detaching position to the delivering position is smaller than the angle 11 corresponding to the movement of the detaching device from the delivering position to the detaching position. Consequently, the return of the detaching device is accelerated.

As shown in the drawing, the detaching position of the detaching device 7 is determined by the outer dead center position of the elbow lever 4, 5. During the advancing and return movement of the detaching device 7 elbow lever 4, 5 is bent toward the support of crank lever 1. The necessary standstill of detaching device 7 in the detaching position is obtained in the dead center positions of crank lever 1 and connecting rod 2 on one hand and of the elbow lever 4, 5 on the other hand. During the angle of rotation 12 of crank lever 1 which causes the tilting angle 13 of elbow lever 4, 5 the detaching device 7 is at a standstill.

It is, of course, possible to design the driving mechanism in such a way that the detaching position of the detaching device 7 is reached when the elbow lever is in its inner dead center position. Furthermore, elbow lever 4, 5 may be bent away from the rotatable support of crank lever 1. For purposes of increasing or decreasing the standstill period of the detaching device 7 the location of the elbow lever 4, 5 may be so selected that it does not correspond exactly but only approximately to either of the dead center positions of the elbow lever. While the invention has been described primarily in connection with the detaching device of the comber it may simultaneously serve for driving the nipping device of the comber.

It is to be understood that the embodiment described is shown for purposes of illustration and that various changes can be made thereto without departing from the spirit and scope of this invention which are defined in the appended claims.

What is claimed is:

1. In a comber having detaching and nipping devices, reciprocable from a delivering position towards each other to a detaching position and away from each other to said delivering position: a driving mechanism connected to one of said devices and comprisinga crank lever rotatably supported in said comber, an elbow lever having one arm pivotally supported in said comber and the other arm pivotally connected to said one device, and a connecting rod having a first end portion connected to said crank lever and a second end portion connected to said elbow lever for reciprocating said elbow lever from a first end position to a second end position and back to said first end position upon rotation of said crank lever and said first end portion connected thereto from one of its dead center positions to the other dead center position and further to the said one dead center position; in one of said end positions, the arms of said elbow lever being in alignment with each other and the device connected to one of said arms being in said detaching position.

2. The combination of claim 1, wherein said connecting rod is connected to said crank lever so that the two dead center positions of said crank lever and said first end portion connected thereto are offset with regard to each other by an angle diiferent from so that the angle of rotation of the crank lever for the movement of said one device from said detaching position to said delivering position is smaller than the angle of rotation of the crank lever for the movement of said one device from the delivering to the detaching position.

References Cited UNITED STATES PATENTS 1,446,750 2/1923 Jolly 19-235 2,865,055 12/1958 Schumann. 2,986,909 6/1961 Liebrandt et a1. 7443 3,232,132 2/1966 Kawamura et a1. 1923l 3,290,731 12/1966 Katori.

FOREIGN PATENTS 127,041 l/ 1902 Germany.

FRED C. MATTERN, JR., Primary Examiner W. S. RATLIFF, In, Assistant Examiner US. Cl. X.R. l9-23 l, 235 

